Duties of caregivers in the Philippines

Dear PAO,

My nephew wants to become a caregiver, and I am willing to support him financially for his training, as his parents are minimum wage earners. But, I would like to know what the duties of caregivers are under the law. There seems to be a common misconception in our province that caregivers are similar to domestic helpers. I want to ensure my nephew is treated appropriately once he becomes a certified caregiver. If he becomes a caregiver, he should only be given duties required of a caregiver, not of a helper or kasambahay. Please advise.